// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/browser/browser_process_sub_thread.h"

#include "base/debug/leak_tracker.h"
#include "base/threading/thread_restrictions.h"
#include "base/trace_event/memory_dump_manager.h"
#include "build/build_config.h"
#include "content/browser/browser_child_process_host_impl.h"
#include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
#include "content/browser/notification_service_impl.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_request.h"

#if defined(OS_WIN)
#include "base/win/scoped_com_initializer.h"
#endif

namespace content {

BrowserProcessSubThread::BrowserProcessSubThread(BrowserThread::ID identifier)
    : BrowserThreadImpl(identifier)
{
}

BrowserProcessSubThread::~BrowserProcessSubThread()
{
    Stop();
}

void BrowserProcessSubThread::Init()
{
#if defined(OS_WIN)
    com_initializer_.reset(new base::win::ScopedCOMInitializer());
#endif

    notification_service_.reset(new NotificationServiceImpl());

    BrowserThreadImpl::Init();

    if (BrowserThread::CurrentlyOn(BrowserThread::IO)) {
        // Though this thread is called the "IO" thread, it actually just routes
        // messages around; it shouldn't be allowed to perform any blocking disk
        // I/O.
        base::ThreadRestrictions::SetIOAllowed(false);
        base::ThreadRestrictions::DisallowWaiting();
    }
}

void BrowserProcessSubThread::CleanUp()
{
    if (BrowserThread::CurrentlyOn(BrowserThread::IO))
        IOThreadPreCleanUp();

    BrowserThreadImpl::CleanUp();

    notification_service_.reset();

#if defined(OS_WIN)
    com_initializer_.reset();
#endif
}

void BrowserProcessSubThread::IOThreadPreCleanUp()
{
    // Kill all things that might be holding onto
    // net::URLRequest/net::URLRequestContexts.

    // Destroy all URLRequests started by URLFetchers.
    net::URLFetcher::CancelAll();

    // If any child processes are still running, terminate them and
    // and delete the BrowserChildProcessHost instances to release whatever
    // IO thread only resources they are referencing.
    BrowserChildProcessHostImpl::TerminateAll();

    // Unregister GpuMemoryBuffer dump provider before IO thread is shut down.
    base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
        BrowserGpuMemoryBufferManager::current());
}

} // namespace content
